94 lines
2.3 KiB
JavaScript
94 lines
2.3 KiB
JavaScript
/* Copyright 2013 Mozilla Foundation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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import { GrabToPan } from './grab_to_pan';
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import { localized } from './ui_utils';
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/**
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* @typedef {Object} HandToolOptions
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* @property {HTMLDivElement} container - The document container.
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* @property {EventBus} eventBus - The application event bus.
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* @property {BasePreferences} preferences - Object for reading/writing
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* persistent settings.
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*/
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class HandTool {
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/**
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* @param {HandToolOptions} options
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*/
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constructor({ container, eventBus, preferences, }) {
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this.container = container;
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this.eventBus = eventBus;
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this.wasActive = false;
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this.handTool = new GrabToPan({
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element: this.container,
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onActiveChanged: (isActive) => {
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this.eventBus.dispatch('handtoolchanged', { isActive, });
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},
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});
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this.eventBus.on('togglehandtool', this.toggle.bind(this));
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let enableOnLoad = preferences.get('enableHandToolOnLoad');
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Promise.all([localized, enableOnLoad]).then((values) => {
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if (values[1] === true) {
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this.handTool.activate();
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}
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}).catch(function(reason) {});
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this.eventBus.on('presentationmodechanged', (evt) => {
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if (evt.switchInProgress) {
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return;
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}
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if (evt.active) {
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this.enterPresentationMode();
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} else {
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this.exitPresentationMode();
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}
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});
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}
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/**
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* @return {boolean}
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*/
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get isActive() {
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return !!this.handTool.active;
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}
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toggle() {
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this.handTool.toggle();
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}
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enterPresentationMode() {
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if (this.isActive) {
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this.wasActive = true;
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this.handTool.deactivate();
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}
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}
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exitPresentationMode() {
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if (this.wasActive) {
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this.wasActive = false;
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this.handTool.activate();
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}
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}
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}
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export {
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HandTool,
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};
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